code: def test_colorize(heatmap, colormap):
      colorized = colormap(heatmap)
      # check rank
      assert len(colorized.shape) == 3
      # check that in interval [0, 1]
      assert colorized.max() <= 1.0
      assert 0.0 <= colorized.min()
  
imports: import pytest
  import numpy
  from eli5.base import Explanation, TargetExplanation
  from eli5.formatters.image import format_as_image, heatmap_to_image, expand_heatmap, _validate_heatmap, _update_alpha, _cap_alpha, _overlay_heatmap
  from .utils_image import assert_pixel_by_pixel_equal
label_desc: Use image node_id 11 for calling a global function with example usage: test_colorize(heatmap, colormap) without return types